skbuff: skb_over_panic: text:ffffffff830a6c8f len:184 put:172 head:ffff88810e182800 data:ffff88810e182800 tail:0xb8 end:0x80 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:110! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 404 Comm: udevd Not tainted 5.10.77-syzkaller-01258-g76698ea35fd3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106 Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 8c 4d 89 fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 RSP: 0018:ffffc9000015fee8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85873b60 RCX: 07ca6c0259578100 RDX: 0000000000000703 RSI: 0000000000000703 RDI: 0000000000000000 RBP: ffffc9000015ff30 R08: ffffffff81545288 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff88810e182800 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 00007f6d0e307840(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557f32271628 CR3: 000000010d693000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic+0x2c/0x30 net/core/skbuff.c:115 skb_put+0x205/0x210 net/core/skbuff.c:1877 skb_put_zero include/linux/skbuff.h:2270 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1116 [inline] cdc_ncm_fill_tx_frame+0x127f/0x3d50 drivers/net/usb/cdc_ncm.c:1293 cdc_ncm_tx_fixup+0x98/0xf0 drivers/net/usb/cdc_ncm.c:1514 usbnet_start_xmit+0x111/0x1a60 drivers/net/usb/usbnet.c:1338 __netdev_start_xmit include/linux/netdevice.h:4823 [inline] netdev_start_xmit include/linux/netdevice.h:4837 [inline] xmit_one+0x16a/0x480 net/core/dev.c:3589 dev_hard_start_xmit+0xad/0x1c0 net/core/dev.c:3605 sch_direct_xmit+0x28f/0x9b0 net/sched/sch_generic.c:336 qdisc_restart net/sched/sch_generic.c:401 [inline] __qdisc_run+0x245/0x3e0 net/sched/sch_generic.c:409 qdisc_run include/net/pkt_sched.h:127 [inline] __dev_xmit_skb net/core/dev.c:3781 [inline] __dev_queue_xmit+0xe7e/0x2ac0 net/core/dev.c:4135 dev_queue_xmit+0x17/0x20 net/core/dev.c:4200 neigh_resolve_output+0x693/0x740 net/core/neighbour.c:1497 neigh_output include/net/neighbour.h:518 [inline] ip6_finish_output2+0x109c/0x1930 net/ipv6/ip6_output.c:145 __ip6_finish_output+0x610/0x7b0 net/ipv6/ip6_output.c:210 ip6_finish_output+0x3f/0x1e0 net/ipv6/ip6_output.c:220 NF_HOOK_COND include/linux/netfilter.h:293 [inline] ip6_output+0x211/0x4c0 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:304 [inline] mld_sendpack+0x5fc/0xb20 net/ipv6/mcast.c:1676 mld_send_cr net/ipv6/mcast.c:1972 [inline] mld_ifc_timer_expire+0x85b/0xc50 net/ipv6/mcast.c:2471 call_timer_fn+0x35/0x280 kernel/time/timer.c:1420 expire_timers+0x21f/0x3b0 kernel/time/timer.c:1465 __run_timers+0x548/0x680 kernel/time/timer.c:1756 run_timer_softirq+0x69/0xf0 kernel/time/timer.c:1769 __do_softirq+0x27e/0x598 kernel/softirq.c:305 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:402 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:432 irq_exit_rcu+0x9/0x10 kernel/softirq.c:444 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1095 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:stack_trace_consume_entry+0x1/0x290 kernel/stacktrace.c:82 Code: ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 5c ff ff ff 4c 89 e7 e8 0d db 4a 00 e9 4f ff ff ff e8 33 52 3f 03 0f 1f 00 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 20 48 89 fb 48 ba 00 RSP: 0018:ffffc9000da773f0 EFLAGS: 00000282 RAX: ffffffff83ed37c7 RBX: ffffc9000da77400 RCX: 0000000083ed3701 RDX: 1ffff92001b4ee82 RSI: ffffffff83ed37c7 RDI: ffffc9000da774e0 RBP: ffffc9000da77490 R08: ffffc9000da774e8 R09: 0000000000000002 R10: ffffc9000da774f0 R11: 0000000000000000 R12: ffff88810ca9cf00 R13: ffffffff815bf1a0 R14: ffffc9000da774e0 R15: 0000000000000000 stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:461 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook mm/slab.h:583 [inline] slab_alloc_node mm/slub.c:2948 [inline] slab_alloc mm/slub.c:2956 [inline] kmem_cache_alloc+0x1a2/0x380 mm/slub.c:2961 skb_clone+0x1cc/0x370 net/core/skbuff.c:1459 do_one_broadcast net/netlink/af_netlink.c:1444 [inline] netlink_broadcast_filtered+0x657/0x1180 net/netlink/af_netlink.c:1519 netlink_broadcast net/netlink/af_netlink.c:1543 [inline] netlink_sendmsg+0x9dd/0xe00 net/netlink/af_netlink.c:1925 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x384/0x470 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f6d0e46e163 Code: 64 89 02 48 c7 c0 ff ff ff ff eb b7 66 2e 0f 1f 84 00 00 00 00 00 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 89 54 24 1c 48 RSP: 002b:00007fff7da41538 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000557f321f30e0 RCX: 00007f6d0e46e163 RDX: 0000000000000000 RSI: 00007fff7da41548 RDI: 000000000000000c RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000192 R14: 0000000000000000 R15: 0000557f321c92c0 Modules linked in: ---[ end trace 9f9ce74f27415079 ]--- RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106 Code: 87 85 48 8b 75 c0 48 8b 55 b8 8b 4d d4 44 8b 45 d0 4c 8b 4d c8 b8 00 00 00 00 53 41 56 41 55 41 54 e8 8c 4d 89 fd 48 83 c4 20 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 48 89 e5 41 RSP: 0018:ffffc9000015fee8 EFLAGS: 00010286 RAX: 0000000000000087 RBX: ffffffff85873b60 RCX: 07ca6c0259578100 RDX: 0000000000000703 RSI: 0000000000000703 RDI: 0000000000000000 RBP: ffffc9000015ff30 R08: ffffffff81545288 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff88810e182800 R13: 00000000000000b8 R14: 0000000000000080 R15: dffffc0000000000 FS: 00007f6d0e307840(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557f32271628 CR3: 000000010d693000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: ff 44 89 e1 incl -0x1f(%rcx,%rcx,4) 4: 80 e1 07 and $0x7,%cl 7: 80 c1 03 add $0x3,%cl a: 38 c1 cmp %al,%cl c: 0f 8c 5c ff ff ff jl 0xffffff6e 12: 4c 89 e7 mov %r12,%rdi 15: e8 0d db 4a 00 callq 0x4adb27 1a: e9 4f ff ff ff jmpq 0xffffff6e 1f: e8 33 52 3f 03 callq 0x33f5257 24: 0f 1f 00 nopl (%rax) 27: 55 push %rbp * 28: 48 89 e5 mov %rsp,%rbp <-- trapping instruction 2b: 41 57 push %r15 2d: 41 56 push %r14 2f: 41 55 push %r13 31: 41 54 push %r12 33: 53 push %rbx 34: 48 83 ec 20 sub $0x20,%rsp 38: 48 89 fb mov %rdi,%rbx 3b: 48 rex.W 3c: ba .byte 0xba